Lung Cancer Risk Assessment Tool

Does lung cancer screening make sense for me?

Should you be screened for lung cancer?
A low-dose chest CT scan can reduce your chances of dying from lung cancer if you are in a high risk group. However, every test has some risk. The most common risk of low-dose CT scans is that it will find an abnormality in the lung that is not cancer, but lead to additional tests. On the other hand, if a cancer is found, it is commonly found at an early stage that is curable.

Who is at high risk for lung cancer?
People between the ages of 55 and 79 years who have 30 pack years of tobacco exposure. A "pack year" is calculated as the number of packs per days multiplied by years. For example, someone who smoked a half pack a day for 10 years, then increased to a pack a day for 10 years, and then reduced to a half pack a day for an additional 10 years would have a cumulative 20 pack years ((½ ppd x 10 years) + (1 ppd x 10 years) + (½ ppd x 10 years))=(5 pack years + 10 pack years + 5 pack years). 

What are the other high risk groups?
The AATS Writing Group For Lung Cancer Screening and Surveillance has identified 2 other high risk groups that should be screened annually from age 55 to 79:
  1. Lung Cancer Survivors (i.e. people who have been cured of a previous lung cancer)
  2. People with 20 pack years smoking exposure and another factor that places their risk for developing lung cancer at 5% over the next 5 years
What are the other risk factors?
Published population studies that have been conducted over the past decade in North America and England have identified “other” risk factors, details of these studies can be obtained by clicking on the link beneath each title in the “Risk Model” section. These models empower you to assess your personal risk over the next 5-10 years.

After entering data in all of the fields and calculating your risk, there is an option to print your “risk calculation” for further consultation with your doctor.  

Michael T. Jaklitsch, M.D., FACS
Writing Group Co-Chair

Associate Professor of Surgery
Brigham and Women's Hospital
Boston, MA
Francine L. Jacobson, M.D.
Writing Group Co-Chair

Assistant Professor of Radiology
Brigham and Women's Hospital
Boston, MA

Print Lung Cancer Risk Assessment

Questions marked with are required.

Basic Info


Please use the calculator below to determine your Body Mass Index.
  Imperial System Metric System
Height / Weight ft in      lbs cm      kg
Your BMI is:



2 or more

Smoking History



Never Smoked

Probability of Lung Cancer Diagnosis by Risk Model

Not enough variables

Risk Models